Graduate Thesis Or Dissertation
 

Nutrient Transport Conditions in the Ecuadorian Andes

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/pn89dc64z

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  • This study examines different fate and transport processes of N and P based on uncultivated grass, contour crop, and livestock management across different topographies (i.e. 5% vs. 30% slope) found within the tropical mountains of volcanic pedogenesis in the Ambato river catchment. The hydrologic, cultural, and agricultural properties of the catchment are consistent with many other steep and isolated mountain catchments where subsistence farming creates important impacts on the quality of water flowing downstream to cities. This investigation identified dominant pathways of N and P export based on land use, topographic, and climate conditions in the Ecuadorian Andes through the use of numerical experiments simulated in the Agricultural Policy Environmental eXtender (APEX). The objective of this study was to ultimately consider effective resources to support management decisions to mitigate nutrient exports and better utilize applied fertilizer to reduce production costs for the benefit of the local land managers.
  • Keywords: transport, agriculture, nutrient, Ecuador, mountain, tropic
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